0. What qualifications are required to become a System Admin in some BIG organization? Engineering degree? CCNA? CCNP? RHCE? MCSE?
No not really. Previously what I did at Mithi was product support. I was a product support engineer, a delivery engineer, trainer, a project manager, a solution consultant, and a sys admin...... all rolled into one.
2. What do you like about a job of System Admin?
A sys admin is a unique person. Every one in the company know that this is the one guy who can do it all. This sense of uniqueness does satisfy the emotional well being. Also the sys admin gets to work on ALL the systems, all kinds of technologies that have been employed in that company to run its IT. So you can really enjoy getting your hands dirty working on huge server racks, networking equipment and all such physical things.
Main task is looking after servers, creating policies for users, scheduling backup, looking after disk quota, size etc; anything and everything related to servers and systems is sys admin responsibility. His working hours normally depends on outages, if the day is good he can go home early but if there are some issues (which are always there) he has to extend.
The manager then can grow to a full fledged IT manager, managing the full blown infrastructure of the business, and does report to the CIO or CTO.
5. How much salary one should expect for System Admin's job?
Entry level salaries can be as low as 1L PA. It grows if your skills grow. Good companies pay better, smaller ones really don’t have that spare cash or cant afford, hence it might feel like expolitation. Pay really depends on experience and exposure. With 4/5 years of exp you can expect a package of 4/5 L.
6. Which companies to look for when one wants nice and challenging admin work + job security + good salary + Any names?
Speaking about challenges it depends on the organization, if its a big one, you have lot of issues and more challenges. Like in AXA where a friend works as a sys admin, some 3000 system were migrated to XP from NT, that’s a great experience and challenge. You have to change everything from policies to servers etc, although the design and planning is done by senior sys admins.
Job security is there if you are good, and not working on contract basis. Companies like Accenture hire sys admins mostly on contract basis, and you may not be retained after the end of the contract.
A good way to get in this field is to join some small firms who provide sys admins to the bigger fish.
Names to start of in this field are: CMC, CMS, Satyam and such service companies, who provide their services to other bigger clients. Or alternatively directly join the bigger brand names. But the bigger brands hardly do hire on their own, so a consultant is a good idea.
Conclusion:
Becoming a System Administrator is a good way to enter the vast field of IT. It’s a non development area, so is easy, but not stress free. Hard work is needed for the first few years to gain the much needed expertise. Alternatives to this field are Network Administration (highly specific, high technology area), Enterprise systems management (products like CA Unicenter, IBM Tivoli, BMC Patrol, HP Openview), Product Support (where you give tech support to specific products), are better earners when it comes to salaries.
Please feel free to mail me for any further queries.